Filter Design of Wireless Base Station Power Supply

doi:10.12142/ZTECOM.202401011

ZTE Communications ›› 2024, Vol. 22 ›› Issue (1): 95-105.DOI: 10.12142/ZTECOM.202401011

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Filter Design of Wireless Base Station Power Supply

LI Wei(), GUO Wei, WANG Zhida

ZTE Corporation, Shenzhen 518057, China

Received:2023-04-18 Online:2024-03-29 Published:2024-03-28
About author:LI Wei (li.wei27@zte.com.cn) received his MS degree in mechatronic engineering from Southeast University, China in 2017. Currently he is working as an EMC engineer in ZTE Corporation. His research interests include switching power supply of EMC and lightning protection.
GUO Wei received his master’s degree from Xidian University, China. He currently serves as the director of electromagnetic compatibility for wireless products with ZTE Corporation.
WANG Zhida graduated with a master’s degree from South China University of Technology. He currently serves as the head of the Wireless Product Reliability Department, ZTE Corporation.

Abstract

Abstract:

The design of electromagnetic interference (EMI) filters needs to fulfill the EMI standards. Designing a filter is a time-consuming process for new engineers as well as for those experienced engineers. This paper measures and compares the noise spectrum of the wireless base station power prototype with and without the original filter. The ideal insertion loss (IL) of the original filter is obtained by combining calculation and simulation. It is pointed out that the effect of the original filter is not good. Based on the improved insertion-loss method, the source impedance model of the prototype is established by combining measurement and theory. A procedure for designing EMI filters for switch power supply will be presented. The filter design procedure makes it possible to design filters quickly and easily. Finally, the proposed filter design method is proved to be effective by the EMI measurement of the wireless base station power supply prototype.

Key words: electromagnetic compatibility, common mode noise, EMI filter

LI Wei, GUO Wei, WANG Zhida. Filter Design of Wireless Base Station Power Supply[J]. ZTE Communications, 2024, 22(1): 95-105.

Figures/Tables 26

References 9

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